Data supporting the publication: Post-regeneration neutralization enables stable phosphate adsorption-desorption in Ca- and NOM-rich waters

This dataset contains experimental data generated to investigate the role of post-regeneration neutralization in phosphate adsorption–regeneration processes using iron oxide adsorbents.The dataset is provided in Microsoft Excel format and includes the following data tables: (i) water sample analysis, (ii) GEH mass measurements, (iii) ATR-FTIR spectra, and (iv) BET-SSA characterization.All data are organized according to experimental groups and operational conditions. The experimental groups include P, P+Ca, P+NOM, and P+Ca+NOM. The operational conditions include rapid rinsing, thorough washing, and acid-assisted neutralization.In the water sample analysis table, data are arranged in columns. The initial columns describe the operation cycle, experimental group and condition, sampling stage (adsorption, regeneration, or neutralization), measured parameters, dilution factors, and units, followed by the corresponding concentration values.In the GEH mass table, data are organized by experimental group and condition, including both wet and dry weights of GEH used under each condition.In the ATR-FTIR spectra table, each column represents the transmittance spectrum of a GEH sample under specific cycles, groups, and operational conditions.In the BET-SSA characterization table, the first four columns present summarized properties of fresh GEH and used GEH from the P+Ca group under the rapid rinsing condition. From the sixth column onward, BJH adsorption and desorption data for these samples are provided.The associated publication provides detailed descriptions of the experimental procedures, data processing, and interpretation.